By Dr Vivek Toshniwal
At 22, 25 or 30, few people stop to think about the age of their lungs. Breathlessness is often blamed on being out of shape, a persistent cough on the weather or an infection, and occasional wheezing on an allergy. Chronic lung disease, meanwhile, is still widely perceived as something that belongs to middle or old age. But today's young adults are growing up and working in an environment where the lungs can face a very different set of challenges. Hours spent in traffic, exposure to fine particulate pollution, second-hand smoke, cigarettes, vaping, indoor pollutants and dust can mean repeated respiratory exposure long before a person considers themselves a “lung patient”. And that is where the concern begins. Lung health is influenced by what happens throughout life. The period during which the lungs develop and reach their maximum function is particularly important. Repeated exposure to air pollution, tobacco smoke and other respiratory irritants can add to the overall burden on the lungs.
The lungs have a peak too
The lungs do not simply grow and then remain unchanged. Lung function increases during childhood and adolescence, reaches a peak in early adulthood and gradually declines as part of normal ageing. That makes young adulthood an important window for respiratory health. If an individual does not achieve their expected peak lung function, or if harmful exposures contribute to a faster decline later, they may have less respiratory reserve to rely on as they age. This does not mean that every young person exposed to pollution has permanently damaged lungs. Nor does living in a polluted city automatically mean someone will develop chronic lung disease. But prolonged exposure to pollutants can irritate the airways and contribute to inflammation, particularly in people who already have asthma, allergies or other susceptibility. The tricky part is that the lungs can compensate remarkably well. A person may continue to study, work, exercise and lead a seemingly normal life even when respiratory health is not optimal.
Pollution: the exposure you cannot always see
For Gen Z, air pollution is often less an occasional event and more a part of everyday life. A typical day may involve commuting beside heavy traffic, spending time outdoors in polluted air, exercising near busy roads and returning home to an indoor environment affected by dust, poor ventilation, tobacco smoke, cooking emissions or other pollutants. Fine particulate matter such as PM2.5 is particularly concerning because these tiny particles can travel deep into the respiratory system. Repeated exposure may aggravate asthma and other airway conditions and contribute to respiratory symptoms in susceptible individuals. Some people may notice cough, throat irritation, wheezing or reduced exercise tolerance. Others may notice very little. Symptoms can vary considerably from person to person. Someone who does not feel breathless should not assume that every aspect of their lung health is necessarily perfect, particularly if they have significant exposure or recurrent respiratory symptoms.
Vaping: a newer concern for young lungs
Then there is vaping — an exposure that is particularly relevant to younger adults. Electronic cigarettes are sometimes perceived as a cleaner or safer alternative to conventional cigarettes because they do not produce traditional tobacco smoke. But inhaling an aerosol containing nicotine and other substances is not the same as inhaling clean air. The long-term health effects of newer vaping products are still being studied, but uncertainty about the full extent of future risk should not be confused with evidence of safety. For a young person who has never smoked, beginning to vape introduces an avoidable respiratory exposure. Nicotine can also lead to dependence, making what begins as experimentation harder to stop. Vaping should not be treated as harmless simply because it is different from smoking.
But what about “just social smoking”?
A cigarette at a party or a few cigarettes on weekends may not look like a serious habit. But “occasional” does not mean risk-free. Tobacco smoke contains numerous harmful chemicals, and repeated exposure adds to cumulative risk. There is also another problem: social smoking can gradually become more frequent, particularly when linked to alcohol, peer groups or stress. For a young adult, avoiding tobacco altogether is therefore a much safer strategy than trying to determine how much smoking is “acceptable”.
Looking fit is not the same as having healthy lungs
There is another misconception that can delay diagnosis: the belief that someone who is young and physically active must have healthy lungs. A person may go to the gym, play sports or climb stairs without difficulty and still have an underlying airway problem. Asthma, exercise-induced bronchoconstriction and other respiratory conditions can sometimes become noticeable only during particular activities or after specific exposures. Persistent cough, recurrent wheezing, unexplained breathlessness or a noticeable decline in exercise tolerance should not automatically be dismissed as poor fitness. The pattern matters too. Symptoms that repeatedly occur at night, during exercise, around dust or pollution, or after exposure to smoke deserve attention.
Does this mean Gen Z is developing COPD?
Not necessarily. COPD remains strongly associated with long-term exposures such as smoking and is generally diagnosed later in life. It would be misleading to suggest that every young person exposed to pollution or vaping is developing COPD. The larger issue is lifetime lung health. Lung function achieved in early adulthood and the rate at which it changes thereafter can influence how much respiratory reserve a person has later in life. Protecting lung health early is therefore less about predicting a disease at 25 and more about protecting the lungs a person will depend on at 50, 60 and beyond.
Does every young person need a lung test?
No. A healthy, symptom-free young adult does not automatically need spirometry simply because they live in a city with poor air quality. However, lung-function testing can be useful when there are persistent respiratory symptoms, recurrent wheezing, suspected asthma, significant smoking or vaping exposure, occupational exposure to dust or fumes, or other clinical concerns. Whether spirometry or additional investigations are appropriate depends on the individual’s symptoms, medical history and exposure patterns and should be assessed by a pulmonologist.
Protecting the lungs starts earlier than you think
The encouraging part is that many respiratory risks are modifiable. Not smoking and avoiding vaping are among the most important steps. During periods of poor air quality, reducing prolonged outdoor exposure and avoiding strenuous outdoor exercise when pollution is particularly high can reduce exposure. Good indoor ventilation, avoiding second-hand smoke and using suitable respiratory protection in dusty or hazardous workplaces can also help. Regular physical activity remains important for overall health and fitness, but exercise should not be considered a way to cancel out the effects of smoking or heavy pollution exposure. And persistent symptoms should not become background noise. A cough that keeps returning, unexplained breathlessness, recurrent wheezing, reduced exercise tolerance or repeated respiratory infections deserve medical attention rather than repeated self-treatment. Young age offers an advantage — but it is not immunity. The objective is not to frighten every young adult into believing their lungs are already damaged. It is to replace complacency with awareness. The lungs may not send a warning every time they encounter polluted air, cigarette smoke or vaping aerosols. But respiratory health is built over decades, not days. For Gen Z, the smartest lung-health strategy may therefore be remarkably simple: don't wait for your lungs to struggle before you start protecting them. The best time to protect the lungs you'll need at 50 is while you're still taking them for granted at 25.
(Dr Vivek Toshniwal, MBBS, MD (Pulmonary Medicine), is a Consultant Pulmonologist at Renova Century Hospital, Banjara Hills, Hyderabad, with extensive experience in respiratory medicine. His areas of expertise include interventional pulmonology, paediatric pulmonology, bronchoscopy, thoracoscopy, chronic respiratory diseases, asthma, COPD, interstitial lung disease, respiratory infections, critical care and sleep-related breathing disorders. He is also experienced in advanced diagnostic pulmonary procedures and pulmonary function testing. Dr Toshniwal is committed to providing evidence-based, patient-centred respiratory care and promoting awareness about lung health and early diagnosis of respiratory diseases.)
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